Author
- Imam Birgivi1
- Imām al-Dīn ibn Luṭf Allāh Lāhūrī1
- Isaac Lattes1
- Ja'far Kashfi1
- Jacob Anatoli1
- Jacobus de Cessolis1
- Jacques Legrand1
- Jaghmini1
- Jalal al-Din al-Suyuti1
- Jalaluddin al-Mahalli1
- Jawād ibn Saʻd Jawād al-Baghdādī1
- Jean Filesac1
- Jean Gerson1
- Jean Manesca1
- Jean de Wavrin1
- Jean-François Roussin1
- Jewish Community of Pitigliano, Italy1
- Joan Martines1
- Joannes Oliva1
- Johann Herolt1